LOL. I install software, not authorize companies to sniff my keyboard when their app is on or off. Nice try though, and nice guess. I didn't migrate from an older system. There is no "unknowingly".
It should always be known what app is doing what. Not sure if you have any business experience, but this is a horrible policy that it's not asking. Being an apologist doesn't fix how Apple will anger their markets.
I'm struggling to understand why you think it's Apple's problem, or why Apple, in making it available to users to stop such activity, is going to "anger their markets." I was in software development for 40 years. I built my first home computer from chips, on a wiring board, ran TRS-DOS, CP/M, Warp OS, MS-DOS, Windows from 1.0 to 11, Unix, Linux, Aix and several other flavors of *nix, and OS X from Snow Leopard to Monterey. So, I am kind of familiar with how things go. Lots of stuff goes on in the background that most users have absolutely no clue about.
Some applications in the world use the authority we grant them when installing what WE want to install things THEY want. Should they tell us? Maybe, maybe not, it depends on what they want. But as for "unknowingly," it is definitely possible that in authorizing the installation of Discord, Paradox (games) and Pixelmator, they used
your authorization to install keyboard watchers that may or may not be totally legitimate to their application. You never knew that they had done that because until now Apple had not developed the security system to report that (nor has MS for Windows or *nix, for that matter).
It is a bit like Carbon Copy Cloner, when first install and run under Monterey, reporting that it needs "Full Disk Access" to work properly, then shows how to grant it that access. If I don't want CCC to have "Full Disk Access," I don't have to do what they ask, but then CCC cannot do what I want it to do, which is to make clone backups. Before Monterey, CCC didn't have to ask because there was no security over "Full Disk Access" like there now is in Monterey. CCC is not alone, there are dozens of applications that need access to the things in the System Preferences/Security & Privacy area. It is up to each individual user how much trust they have in the apps they install. Not comfortable? Don't allow access! Now you have the option, where before you had none.
I'm not apologizing for Apple. I don't think they need to apologize for anything. I'm saying that your reaction to finding that Discord, Paradox (games) and Pixelmator were (are) watching your keyboard of blaming Apple for it is not valid because it is not a fault of Apple that they do that or that you authorized them to install on your system. But now you know a bit more about what they are doing, so you get to make an informed decision on whether or not you trust any of them.